package com.example.day1.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.example.day1.common.BaseContent;
import com.example.day1.common.R;
import com.example.day1.entity.ShoppingCart;
import com.example.day1.service.ShoppingCartService;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 购物车
 */
@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

//    /**
//     * 添加购物车
//     * @param shoppingCart
//     * @return
//     */
//    @PostMapping("/add")
//    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
//        log.info("购物车数据:{}",shoppingCart);
//
//        //设置用户id，指定当前是哪个用户的购物车数据
//        Long currentId = BaseContent.getCurrentId();
//        shoppingCart.setUserId(currentId);
//
//        Long dishId = shoppingCart.getDishId();
//
//        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(ShoppingCart::getUserId,currentId);
//
//        if(dishId != null){
//            //添加到购物车的是菜品
//            queryWrapper.eq(ShoppingCart::getDishId,dishId);
//
//        }else{
//            //添加到购物车的是套餐
//            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
//        }
//
//        //查询当前菜品或者套餐是否在购物车中
//        //SQL:select * from shopping_cart where user_id = ? and dish_id/setmeal_id = ?
//        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
//
//        if(cartServiceOne != null){
//            //如果已经存在，就在原来数量基础上加一
//            Integer number = cartServiceOne.getNumber();
//            cartServiceOne.setNumber(number + 1);
//            shoppingCartService.updateById(cartServiceOne);
//        }else{
//            //如果不存在，则添加到购物车，数量默认就是一
//            shoppingCart.setNumber(1);
//            shoppingCart.setCreateTime(LocalDateTime.now());
//            shoppingCartService.save(shoppingCart);
//            cartServiceOne = shoppingCart;
//        }
//
//        return R.success(cartServiceOne);
//    }

    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
            //设置用户的id,先获取到id
        Long currentId = BaseContent.getCurrentId();
        shoppingCart.setUserId(currentId);
        //判断查询的是什么，然后在进行处理
        LambdaQueryWrapper<ShoppingCart> QueryWrapper = new LambdaQueryWrapper<>();
        QueryWrapper.eq(ShoppingCart::getUserId,currentId);

        Long dishId = shoppingCart.getDishId();
        if(dishId!=null){
            //添加购物车的是菜品
            QueryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());
        }else {

        QueryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
            }
        //查询指定套餐或者事物的数量信息，进行处理
        ShoppingCart one = shoppingCartService.getOne(QueryWrapper);
            if(one!=null){
                //存在数量，加一
                Integer number = one.getNumber();
                one.setNumber(number+1);
                shoppingCartService.updateById(one);
            }else{
                shoppingCart.setNumber(1);
                shoppingCartService.save(shoppingCart);
                //保存数据统一处理返回
                one=shoppingCart;
            }
            return R.success(one);

    }

    /**
     * 查看购物车
     * @return
     */
    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车...");

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        //对于不同的用户，用userid进行隔离
        queryWrapper.eq(ShoppingCart::getUserId,BaseContent.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);

        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        return R.success(list);
    }

    /**
     * 清空购物车
     * @return
     */
    @DeleteMapping("/clean")
    public R<String> clean(){
        //SQL:delete from shopping_cart where user_id = ?

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContent.getCurrentId());

        shoppingCartService.remove(queryWrapper);

        return R.success("清空购物车成功");
    }
}